Filter



FIG. 1 is a perspective view of a filter showing our new design;

FIG. 2 is a front view of the filter of FIG. 1;

FIG. 3 is a rear view of the filter of FIG. 1;

FIG. 4 is a left side view of the filter of FIG. 1;

FIG. 5 is a right side view of the filter of FIG. 1;

FIG. 6 is a top view of the filter of FIG. 1; and,

FIG. 7 is a bottom view of the filter of FIG. 1.

The broken lines depicted in the foregoing figures are for purposes of illustration only, and form no part of the claimed design. 

The ornamental design for a filter, as shown and described. 